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### General Rules for 2D and 3D Distance Dimensions

2D and 3D distance dimensions in the Distance dialog box (Insert | Dimension | Distance) apply the following rules according to the related features:

Treatment of Features

- Spheres, Points, Circles, and Sets are treated as Points.

- Slots, Cylinders, Cones, Lines, and 2D Widths are treated as Lines.

- Planes and 3D Widths are treated as Planes.

Other Rules

- If both elements are points (as defined above), PC-DMIS gives the shortest distance from point to point.

- If one element is a line (as defined above) and the other is a point, PC-DMIS gives the shortest distance between the line (or centerline) and the point.

- If both elements are lines, and the Shortest check box is not selected, PC-DMIS gives the shortest distance between the centroid of the first line to the second line. See the "Shortest check box" topic for what happens when it is selected.

- If one element is a plane and the other is a line, PC-DMIS gives the shortest distance between the centroid of the line and the plane

- If one element is a plane and the other is a point, PC-DMIS gives the shortest distance between the point and the plane.

- If both elements are planes, PC-DMIS gives the shortest distance between the centroid of the first plane to the second plane.

More:

2D Distance

3D Distance

Shortest check box